Tina Fey wanted some insight into what Jon Hamm was like before asking him to guest star on her sitcom 30 Rock.

In a joint conversation forInterview Magazine, in which Fey and Hamm reminisce about their careers, friendship and Hamms Your Friends and Neighbors series, Fey mentions calling SNL creator Lorne Michaels to ask about Hamm.

I didnt meet you before you hosted [SNL], and I remember calling or emailing Lorne and saying, Let me know if hes funny because we have a part coming up on30 Rockthat would be great for him. And also to make sure you werent a dick, Fey told Hamm. I mean, thats a real thing. Its not fun to work with people that arent fun, Hamm replied.

Fey added, Thats one where youre just like, I wont do that anymore. Lifes too short and the hours are too long.

Hamm then recalled learning about the 30 Rock role: That was such a fun moment for me too, because I remember coming back down to the host dressing room atSNL, and the phone rang. Im in 30 Rock and its like, Whose phones are these? Does somebody have this number? Whos calling my dressing room? So I picked up and I think it was Robert Carlock on the other end who said, Hey, would you like to do this? We have a part for you. Its a totally normal doctor that wont go weird at all, I promise.

Hamm took on the guest role of Dr. Drew Baird, starring in a multi-episode arc on the seriesin 2009. In the show, Feys Liz Lemon likes her neighbor, Baird, given that hes a normal human man and also happens to love baking.

However, not all is what it seems, as Fey recalled, And by the end of this arc, you have hooks for hands. And it turned out you were an incompetent doctor. We ruined you.

Fey and Hamm have since been friends for 15 years, said Hamm, and reteamed to star in Friends With Kids,Unbreakable Kimmy Schmidt,Maggie Moore(s), and the recent Mean Girls film reboot.

Hamm is next starring in the Apple TV+ series Your Friends and Neighbors, streaming April 11, which was already renewed for a second season.